我正在使用美味的文档向正在使用我的应用程序的朋友展示。我已按照这里的教程
https://developers.facebook.com/docs/android/scrumptious/show-friends?locale=en_GB
我已经尝试了所有组合，但它没有检索使用我的应用程序的朋友
我使用了三个班级
scrumptious.java
public class ScrumptiousApplication extends Application {
private List<GraphUser> selectedUsers;
public List<GraphUser> getSelectedUsers() {
return selectedUsers;
}
public void setSelectedUsers(List<GraphUser> selectedUsers) {
this.selectedUsers = selectedUsers;
}
}
Selectionfragment.java
package com.example.facebooknew;
import java.io.ByteArrayInputStream;
import java.io.ByteArrayOutputStream;
import java.io.IOException;
import java.io.ObjectInputStream;
import java.io.ObjectOutputStream;
import java.util.ArrayList;
import java.util.Arrays;
import java.util.List;
import org.json.JSONArray;
import org.json.JSONException;
import org.json.JSONObject;
import com.facebook.FacebookException;
import com.facebook.FacebookOperationCanceledException;
import com.facebook.FacebookRequestError;
import com.facebook.HttpMethod;
import com.facebook.Request;
import com.facebook.RequestAsyncTask;
import com.facebook.Response;
import com.facebook.Session;
import com.facebook.Session.OpenRequest;
import com.facebook.Session.StatusCallback;
import com.facebook.SessionDefaultAudience;
import com.facebook.SessionLoginBehavior;
import com.facebook.SessionState;
import com.facebook.UiLifecycleHelper;
import com.facebook.internal.SessionTracker;
import com.facebook.internal.Utility;
import com.facebook.model.GraphObject;
import com.facebook.model.GraphObjectList;
import com.facebook.model.GraphUser;
import com.facebook.widget.LoginButton;
import com.facebook.widget.ProfilePictureView;
import com.facebook.widget.WebDialog;
import com.facebook.widget.WebDialog.OnCompleteListener;
import android.app.Activity;
import android.content.Context;
import android.content.Intent;
import android.net.Uri;
import android.os.Bundle;
import android.support.v4.app.Fragment;
import android.util.Log;
import android.view.LayoutInflater;
import android.view.View;
import android.view.View.OnClickListener;
import android.view.ViewGroup;
import android.widget.ArrayAdapter;
import android.widget.Button;
import android.widget.ImageView;
import android.widget.ListView;
import android.widget.TextView;
import android.widget.Toast;
public class SelectionFragment extends Fragment{
/* In this fragment the data from the user profile is returned like profile , name etc
* (non-Javadoc)
* @see android.support.v4.app.Fragment#onCreateView(android.view.LayoutInflater, android.view.ViewGroup, android.os.Bundle)
*/
private static final String TAG = "SelectionFragment";
private static final List<String> PERMISSIONS = Arrays.asList(
"email","user_location");
private static final int REAUTH_ACTIVITY_CODE = 100;
private ProfilePictureView profilePictureView;
private TextView userNameView;
private TextView firstName;
private TextView lastName;
private TextView Location;
private UiLifecycleHelper uiHelper;
private List<GraphUser> selectedUsers;
private ListView listView;
private List<BaseListElement> listElements;
private static final String FRIENDS_KEY = "friends";
private TextView userInfoTextView;
private Button sendRequestButton;
private String requestId;
private Session.StatusCallback callback = new Session.StatusCallback() {
@Override
public void call(final Session session, final SessionState state, final Exception exception) {
onSessionStateChange(session, state, exception);
}
};
@Override
public void onActivityCreated(Bundle savedInstanceState) {
super.onActivityCreated(savedInstanceState);
// Check for an incoming notification. Save the info
Uri intentUri = getActivity().getIntent().getData();
if (intentUri != null) {
String requestIdParam = intentUri.getQueryParameter("request_ids");
if (requestIdParam != null) {
String array[] = requestIdParam.split(",");
requestId = array[0];
Log.i(TAG, "Request id: "+requestId);
Toast.makeText(getActivity().getApplicationContext(),requestId, Toast.LENGTH_LONG).show();
}
}
}
@Override
public View onCreateView(LayoutInflater inflater,
ViewGroup container, Bundle savedInstanceState) {
super.onCreateView(inflater, container, savedInstanceState);
View view = inflater.inflate(R.layout.selection, container, false);
// Find the user's profile picture custom view
profilePictureView = (ProfilePictureView) view.findViewById(R.id.selection_profile_pic);
profilePictureView.setCropped(true);
// Find the user's name view
userNameView = (TextView) view.findViewById(R.id.selection_user_name);
firstName= (TextView) view.findViewById(R.id.selection_first_name);
//lastName = (TextView) view.findViewById(R.id.selection_last_name);
//Location = (TextView) view.findViewById(R.id.selection_location);
//userInfoTextView = (TextView) view.findViewById(R.id.userInfoTextView);
sendRequestButton=(Button) view.findViewById(R.id.sendRequestButton);
uiHelper = new UiLifecycleHelper(getActivity(), callback);
uiHelper.onCreate(savedInstanceState);
Session session = Session.getActiveSession();
if (session != null && session.isOpened()) {
// Get the user's data
makeMeRequest(session);
}
sendRequestButton.setOnClickListener(new OnClickListener(){
@Override
public void onClick(View arg0) {
// TODO Auto-generated method stub
sendRequestDialog();
}
});
// Find the list view
listView = (ListView) view.findViewById(R.id.selection_list);
// Set up the list view items, based on a list of
// BaseListElement items
listElements = new ArrayList<BaseListElement>();
// Add an item for the friend picker
listElements.add(new PeopleListElement(0));
// Set the list view adapter
listView.setAdapter(new ActionListAdapter(getActivity(),
R.id.selection_list, listElements));
if (savedInstanceState != null) {
// Restore the state for each list element
for (BaseListElement listElement : listElements) {
listElement.restoreState(savedInstanceState);
}
}
return view;
}
private void makeMeRequest(final Session session) {
// Make an API call to get user data and define a
// new callback to handle the response.
Request request = Request.newMeRequest(session,
new Request.GraphUserCallback() {
@Override
public void onCompleted(GraphUser user, Response response) {
// If the response is successful
if (session == Session.getActiveSession()) {
if (user != null) {
// Set the id for the ProfilePictureView
// view that in turn displays the profile picture.
profilePictureView.setProfileId(user.getId());
// Set the Textview's text to the user's name.
userNameView.setText(user.getName());
//firstName.setText(user.getFirstName());
//lastName.setText(user.getLastName());
//Location.setText(user.getProperty("email").toString());
}
}
if (response.getError() != null) {
// Handle errors, will do so later.
}
}
});
request.executeAsync();
}
@Override
public void onActivityResult(int requestCode, int resultCode, Intent data) {
super.onActivityResult(requestCode, resultCode, data);
if (requestCode == REAUTH_ACTIVITY_CODE) {
uiHelper.onActivityResult(requestCode, resultCode, data);
} else if (resultCode == Activity.RESULT_OK) {
// Do nothing for now
}else if (resultCode == Activity.RESULT_OK &&
requestCode >= 0 && requestCode < listElements.size()) {
listElements.get(requestCode).onActivityResult(data);
}
}
private void onSessionStateChange(final Session session, SessionState state, Exception exception) {
if (session != null && session.isOpened()) {
// Get the user's data.
if (state.isOpened() && requestId != null) {
getRequestData(requestId);
}
if (state.isOpened()) {
sendRequestButton.setVisibility(View.VISIBLE);
} else if (state.isClosed()) {
sendRequestButton.setVisibility(View.INVISIBLE);
}
makeMeRequest(session);
}
}
@Override
public void onResume() {
super.onResume();
uiHelper.onResume();
}
@Override
public void onSaveInstanceState(Bundle bundle) {
super.onSaveInstanceState(bundle);
for (BaseListElement listElement : listElements) {
listElement.onSaveInstanceState(bundle);
}
uiHelper.onSaveInstanceState(bundle);
}
@Override
public void onPause() {
super.onPause();
uiHelper.onPause();
}
@Override
public void onDestroy() {
super.onDestroy();
uiHelper.onDestroy();
}
private interface MyGraphLanguage extends GraphObject {
// Getter for the ID field
String getId();
// Getter for the Name field
String getName();
}
private class ActionListAdapter extends ArrayAdapter<BaseListElement> {
private List<BaseListElement> listElements;
public ActionListAdapter(Context context, int resourceId,
List<BaseListElement> listElements) {
super(context, resourceId, listElements);
this.listElements = listElements;
// Set up as an observer for list item changes to
// refresh the view.
for (int i = 0; i < listElements.size(); i++) {
listElements.get(i).setAdapter(this);
}
}
@Override
public View getView(int position, View convertView, ViewGroup parent) {
View view = convertView;
if (view == null) {
LayoutInflater inflater =
(LayoutInflater) getActivity()
.getSystemService(Context.LAYOUT_INFLATER_SERVICE);
view = inflater.inflate(R.layout.listitem, null);
}
BaseListElement listElement = listElements.get(position);
if (listElement != null) {
view.setOnClickListener(listElement.getOnClickListener());
ImageView icon = (ImageView) view.findViewById(R.id.icon);
TextView text1 = (TextView) view.findViewById(R.id.text1);
TextView text2 = (TextView) view.findViewById(R.id.text2);
if (icon != null) {
icon.setImageDrawable(listElement.getIcon());
}
if (text1 != null) {
text1.setText(listElement.getText1());
}
if (text2 != null) {
text2.setText(listElement.getText2());
}
else{
Toast.makeText(getActivity().getApplicationContext(),"No data received " ,Toast.LENGTH_LONG).show();
}
}
return view;
}
}
/* It is private class used to populate the friend and bring up the friends list*/
private class PeopleListElement extends BaseListElement {
public PeopleListElement(int requestCode) {
super(getActivity().getResources().getDrawable(R.drawable.add_friends),
getActivity().getResources().getString(R.string.action_people),
getActivity().getResources().getString(R.string.action_people_default),
requestCode);
}
/* this event will trigger the picker activity*/
@Override
protected View.OnClickListener getOnClickListener() {
return new View.OnClickListener() {
@Override
public void onClick(View view) {
// Do nothing for now
startPickerActivity(PickerActivity.FRIEND_PICKER, getRequestCode());
}
};
}
private void setUsersText() {
String text = null;
if (selectedUsers != null) {
// If there is one friend
if (selectedUsers.size() == 1) {
text = String.format(getResources()
.getString(R.string.single_user_selected),
selectedUsers.get(0).getName());
} else if (selectedUsers.size() == 2) {
// If there are two friends
text = String.format(getResources()
.getString(R.string.two_users_selected),
selectedUsers.get(0).getName(),
selectedUsers.get(1).getName());
} else if (selectedUsers.size() > 2) {
// If there are more than two friends
text = String.format(getResources()
.getString(R.string.multiple_users_selected),
selectedUsers.get(0).getName(),
(selectedUsers.size() - 1));
}
}
if (text == null) {
// If no text, use the placeholder text
text = getResources()
.getString(R.string.action_people_default);
}
// Set the text in list element. This will notify the
// adapter that the data has changed to
// refresh the list view.
setText2(text);
}
@Override
protected void onActivityResult(Intent data) {
selectedUsers = ((ScrumptiousApplication) getActivity()
.getApplication())
.getSelectedUsers();
setUsersText();
notifyDataChanged();
}
@Override
protected void onSaveInstanceState(Bundle bundle) {
if (selectedUsers != null) {
bundle.putByteArray(FRIENDS_KEY,
getByteArray(selectedUsers));
}
}
private byte[] getByteArray(List<GraphUser> users) {
// convert the list of GraphUsers to a list of String
// where each element is the JSON representation of the
// GraphUser so it can be stored in a Bundle
List<String> usersAsString = new ArrayList<String>(users.size());
for (GraphUser user : users) {
usersAsString.add(user.getInnerJSONObject().toString());
}
try {
ByteArrayOutputStream outputStream = new ByteArrayOutputStream();
new ObjectOutputStream(outputStream).writeObject(usersAsString);
return outputStream.toByteArray();
} catch (IOException e) {
Log.e(TAG, "Unable to serialize users.", e);
}
return null;
}
private List<GraphUser> restoreByteArray(byte[] bytes) {
try {
@SuppressWarnings("unchecked")
List<String> usersAsString =
(List<String>) (new ObjectInputStream
(new ByteArrayInputStream(bytes)))
.readObject();
if (usersAsString != null) {
List<GraphUser> users = new ArrayList<GraphUser>
(usersAsString.size());
for (String user : usersAsString) {
GraphUser graphUser = GraphObject.Factory
.create(new JSONObject(user),
GraphUser.class);
users.add(graphUser);
}
return users;
}
} catch (ClassNotFoundException e) {
Log.e(TAG, "Unable to deserialize users.", e);
} catch (IOException e) {
Log.e(TAG, "Unable to deserialize users.", e);
} catch (JSONException e) {
Log.e(TAG, "Unable to deserialize users.", e);
}
return null;
}
@Override
protected boolean restoreState(Bundle savedState) {
byte[] bytes = savedState.getByteArray(FRIENDS_KEY);
if (bytes != null) {
selectedUsers = restoreByteArray(bytes);
setUsersText();
return true;
}
return false;
}
}
/* This function is responsible for launching the freind picker activity*/
private void startPickerActivity(Uri data, int requestCode) {
Intent intent = new Intent();
intent.setData(data);
intent.setClass(getActivity(), PickerActivity.class);
startActivityForResult(intent, requestCode);
}
public void facebookSession(Session session){
//session= Session.getActiveSession();
Session.OpenRequest request = new Session.OpenRequest(this);
request.setPermissions(Arrays.asList("basic_info","email","location"));
request.setCallback( new Session.StatusCallback() {
// callback when session changes state
@Override
public void call(Session session, SessionState state, Exception exception) {
if (session.isOpened()) {
Request.newMeRequest(session, new Request.GraphUserCallback() {
@Override
public void onCompleted(GraphUser user, Response response) {
if (user != null) {
Toast.makeText(SelectionFragment.this.getActivity(), "User email is:"+user.getProperty("email"), Toast.LENGTH_SHORT).show(); }
else {
Toast.makeText(SelectionFragment.this.getActivity(), "Error User Null", Toast.LENGTH_SHORT).show();
}
}
}).executeAsync();
}
}
}); //end of call;
session.openForRead(request); //now do the request above
}
private void sendRequestDialog() {
Bundle params = new Bundle();
params.putString("message", "Learn how to make your Android apps social");
params.putString("data",
"https://play.google.com/store/apps/details?id=de.j4velin.mapsmeasure&hl=en");
WebDialog requestsDialog = (
new WebDialog.RequestsDialogBuilder(getActivity(),
Session.getActiveSession(),
params))
.setOnCompleteListener(new OnCompleteListener() {
@Override
public void onComplete(Bundle values,
FacebookException error) {
if (error != null) {
if (error instanceof FacebookOperationCanceledException) {
Toast.makeText(getActivity().getApplicationContext(),
"Request cancelled",
Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getActivity().getApplicationContext(),
"Network Error",
Toast.LENGTH_SHORT).show();
}
} else {
final String requestId = values.getString("request");
if (requestId != null) {
Toast.makeText(getActivity().getApplicationContext(),
"Request sent",
Toast.LENGTH_SHORT).show();
Toast.makeText(getActivity().getApplicationContext(), requestId, Toast.LENGTH_SHORT).show();
} else {
Toast.makeText(getActivity().getApplicationContext(),
"Request cancelled",
Toast.LENGTH_SHORT).show();
}
}
}
})
.build();
requestsDialog.show();
}
private void getRequestData(final String inRequestId) {
// Create a new request for an HTTP GET with the
// request ID as the Graph path.
Request request = new Request(Session.getActiveSession(),
inRequestId, null, HttpMethod.GET, new Request.Callback() {
@Override
public void onCompleted(Response response) {
// Process the returned response
GraphObject graphObject = response.getGraphObject();
FacebookRequestError error = response.getError();
// Default message
String message = "Incoming request";
if (graphObject != null) {
// Check if there is extra data
if (graphObject.getProperty("data") != null) {
try {
// Get the data, parse info to get the key/value info
JSONObject dataObject =
new JSONObject((String)graphObject.getProperty("data"));
// Get the value for the key - badge_of_awesomeness
String badge =
dataObject.getString("badge_of_awesomeness");
// Get the value for the key - social_karma
String karma =
dataObject.getString("social_karma");
// Get the sender's name
JSONObject fromObject =
(JSONObject) graphObject.getProperty("from");
String sender = fromObject.getString("name");
String title = sender+" sent you a gift";
// Create the text for the alert based on the sender
// and the data
message = title + "\n\n" +
"Badge: " + badge +
" Karma: " + karma;
} catch (JSONException e) {
message = "Error getting request info";
}
} else if (error != null) {
message = "Error getting request info";
}
}
Toast.makeText(getActivity().getApplicationContext(),
message,
Toast.LENGTH_LONG).show();
}
});
// Execute the request asynchronously.
Request.executeBatchAsync(request);
}
}
And I have an abstarct baselist element class